The study of early cross-linguistic diplomatic epistolography was first introduced in Brownlees' (2012) comparative study of Italian and English personal newsletters. Given the field’s young age and the strong need for both further research and the retrieving of new, untranscribed and unanalysed data, the present study set out to help move this field forward by examining, at both a textual superstructure and semantic macrostructural level, two sets of unchartered diplomatic newsletters which representatives at foreign courts despatched back to their respective home countries. The first set of original manuscripts comprises periodical newsletters which Baron Christer Bonde, the Swedish ambassador-extraordinary to England, wrote to Charles X, King of Sweden, between 1655-6, whereas the second set consists of letters sent in 1680 by John Robinson, England’s chargé d’affaires in Sweden, to Sir Leoline Jenkins, Secretary of State for the Northern Department of England. The analysis has shown that whereas the textual superstructures of the two diplomats’ correspondences remain similarly robust, the instantiating semantic macrostructures display not only stylistic and compositional, but also narrative, variation.